issue-#28 (1)

- two-step task

tasks/two-step/experiment.html

@@ -23,6 +23,7 @@
   <script src="../../lib/jspsych-6.3.1/plugins/jspsych-preload.js"></script>
   <script src="../../lib/jspsych-6.3.1/plugins/jspsych-fullscreen.js"></script>
   <script src="../../lib/jspsych-6.3.1/plugins/jspsych-call-function.js"></script>
+  <script src="../../lib/jspsych-6.3.1/plugins/jspsych-html-keyboard-response.js"></script>
 
   <!-- Load CSS styles -->
   <link href="../../lib/jspsych-6.3.1/css/jspsych.css" rel="stylesheet" type="text/css"></link>
@@ -56,6 +57,7 @@
   var timeline = [];
   timeline = timeline.concat(PRELOAD);
   timeline = timeline.concat(FULLSCREEN);
+  timeline = timeline.concat(INSTRUCTIONS_SKIP);
   timeline = timeline.concat(INSTRUCTIONS);
   timeline = timeline.concat(READY_01);
   timeline = timeline.concat(TWO_STEP_TASK.slice(0,100));

tasks/two-step/js/two-step-instructions.js

@@ -505,13 +505,29 @@ const instructions_loop_3a = {
 // Define instructions timeline
 //---------------------------------------//
 
-var INSTRUCTIONS = [
-  instructions_loop_1a,
-  instructions_loop_1b,
-  instructions_loop_2a,
-  instructions_loop_2b,
-  instructions_loop_3a
-]
+var INSTRUCTIONS_SKIP = {
+  type: 'html-keyboard-response',
+  stimulus: '<p>You are starting a demo of the <b>two-step task.</b></p><p>To see the instructions, press the "1" key. To skip them, press the "2" key.</p>',
+  choices: ["1","2"]
+}
+
+var INSTRUCTIONS = {
+  timeline: [
+    instructions_loop_1a,
+    instructions_loop_1b,
+    instructions_loop_2a,
+    instructions_loop_2b,
+    instructions_loop_3a
+  ],
+  conditional_function: function(){
+        var data = jsPsych.data.get().last(1).values()[0];
+        if(jsPsych.pluginAPI.compareKeys(data.response, '2')){
+            return false;
+        } else {
+            return true;
+        }
+    }
+}
 
 //---------------------------------------//
 // Define useful functions